CH3 CH3 C=CHCHO O2N NH-NH2→ CH3 C=CHCH=N-NH N02 (黄色 CH3 NO2 NO CH3 CH3 COOH C=CHCHO KMnO4 C=0+ CH3 CH3 COOH HOOCCOOH △，CO2t+HCOOH (B) (C) 0 HCOOH +2Ag(NH3)2OH->NH4-O-C-ONH4 2Ag+2NH3 +H2O C CHCHO CH3 CH3 + O2N NH NO2 NH2 C CHCH CH3 CH3 N NH NO2 NO2 (黄色) HCOOH + NH4 O C O ONH4 2Ag(NH3) 2 OH + 2Ag + 2NH3 + H2 O C CHCHO CH3 CH3 KMnO4 H + C O CH3 CH3 + COOH COOH HOOCCOOH CO2 ↑ + HCOOH (B) (C)